Mark Cuban threw away his watch on the day he became a millionaire

The day Mark Cuban became a millionaire, he took off his watch and threw it away. Mark Cuban values his time more than anything else, he recently said at SXSW. He did something to prove it when he became a billionaire, he said at the SXSW event.

Mark Cuban says the Breathometer was the worst investment he's ever made on the show. 'Next thing you know, all of the money’s gone,' he says. 'Shark Tank' has been on the ABC show for more than a decade. The Breathometer is a breathometer.

Entrepreneur and investor Mark Cuban wanted to celebrate the $5.7 billion sale of his company, Broadcast.com, to Yahoo. His trip to Las Vegas quickly took a turn.